PT-2024-8979 · Linux+3 · Linux Kernel+3

Published 2024-05-24 · Updated 2024-11-27 · CVE-2021-47569

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions: Linux kernel versions prior to 5.16.0-rc1-syzkaller

Description: The issue is related to the io uring component of the Linux kernel, which is associated with incorrect resource locking. This can lead to a denial of service when the callback is executed in a fallback mode for exiting tasks. The vulnerability requires the original task's context to perform cancellations, and if the task is dying, the cancellation attempt fails.

Recommendations: To resolve the issue, update the Linux kernel to a version that includes the fix for the io uring component. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Improper Locking

Weakness Enumeration

CWE-667

Related Identifiers

BDU:2024-10661

CVE-2021-47569

SUSE-SU-2024:2008-1

SUSE-SU-2024:2019-1

SUSE-SU-2024:2190-1

Affected Products

Astra Linux

Linux Kernel

Red Os

Suse

References · 1181

• https://git.kernel.org/stable/c/617a89484debcd4e7999796d693cf0b77d2519de · Patch
• https://osv.dev/vulnerability/SUSE-SU-2024:2019-1 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-47569 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-47569 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-47569 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2024:2190-1 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2021-47569 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-47569 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-47569 · Vendor Advisory
• https://git.kernel.org/stable/c/3d2a1e68fd9904fdc1b02f2e7d40ca47df7ba39f · Patch
• https://osv.dev/vulnerability/SUSE-SU-2024:2008-1 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2021-47569 · Security Note
• https://bdu.fstec.ru/vul/2024-10661 · Security Note
• https://bugzilla.suse.com/1223819 · Note
• https://bugzilla.suse.com/1222721 · Note